After the patent of Sigma 24-70mm f/2.8 DG OS HSM Art Lens filed two months ago, Sigma has just filed another new patent for Sigma 70-200mm f/2.8 DG OS HSM Sports Lens. This means both the zoom lenses will be announced together in next… Read moreNew Patent: Sigma 70-200mm f/2.8 DG OS HSM Sports Lens